Decree-Law 109/2023, article 4 (translated):
8 - Documents and visas relating to stay in national territory, whose validity expires from the date of entry into force of this decree-law or in the 15 days immediately preceding, are accepted, under the same terms, until June 30, 2024.
9 - The documents referred to in the previous paragraph will continue to be accepted, under the same terms, after June 30, 2024, as long as the holder provides proof that they have already scheduled their renewal.